The letters by Dr. Martin Luther King Junior addressed people and inspired people by mentioning the "legal" acts done by Adolf Hitler in Germany and "illegal" freedom movement in Hungary. He wanted the audience to understand and differentiate between justice and injustice caused by the governments themselves, and he inspired people to take action. He called the step as "urgent" and motivated people to stop segregation and unite and take action against it. He used simplified language to sow the actual intentions of the non-violent measures taken by the white people, which were causing injustice to the non-whites.
One way Diocletian brought short-term order to Rome was to "divide the empire" into to distinct spheres--in the hope that this would make it easier to manage.
I believe that d should be false because if both sides wanted to secede, then neither side would have a problem splitting apart and thus there would have been no reason for the Civil War in the first place.
In 1986 Supreme Court upheld the segregation through the constitution under the doctrine of "separate but equal" which stemmed in the case of Plessy v. Ferguson. Homer Plessy, who was an African American train passenger refused to sit with Jim Crow and was brought to Judge John H. Ferguson.